Leonardo Gayon
@leonardogayon
Backend software engineer building Java and Spring Boot microservices; solved Google Gemini API overuse with cached responses.
ColombiaWhat I'm looking for
At Empresa LLC de EE. UU., I took features from scoping through deployment and support for a production application built with Node.js and Express.js. I also supported PostgreSQL in production, investigating data issues and writing targeted SQL fixes.
I resolved overuse of Google Gemini API keys by caching responses to recurring requests in localStorage. I worked with Claude Code for code review and technical research, and developed with TypeScript and React alongside the backend.
At Tendencia Pixel, I designed and delivered REST microservices with Spring Boot and PostgreSQL. I implemented JWT authentication between services and containerized them with Docker.
Across freelance and earlier engineering work, I built Java and Spring Boot services, configured Azure DevOps CI/CD pipelines, and deployed services to Azure Container Apps. I also optimized SQL queries and connection pooling, reducing query times by 20%.
Experience
Work history, roles, and key accomplishments
Ingeniero de Software Freelance
Clientes Confidenciales
Jul 2026 - Present (3 months)
Desarrollo proyectos de software pequeños para clientes privados bajo acuerdos de confidencialidad.
Ingeniero de Software (Contratista)
Empresa LLC de EE. UU.
Feb 2026 - Jun 2026 (4 months)
Llevé funcionalidades de punta a punta en una aplicación en producción con Node.js/Express.js, incluyendo alcance, diseño, implementación, despliegue y soporte. Resolví el sobreconsumo de las API keys de Google Gemini mediante caché local de respuestas recurrentes.
Ingeniero de Software
Tendencia Pixel
Feb 2025 - Jul 2025 (5 months)
Diseñé y entregué microservicios REST en Spring Boot con PostgreSQL, implementé autenticación JWT, contenericé servicios con Docker y refactoricé módulos centrales aplicando SOLID y Clean Code.
Desarrollador de Software
Freelance
Mar 2024 - Sep 2024 (6 months)
Construí microservicios REST en Java Spring Boot integrados con Azure Table Storage, configuré pipelines CI/CD en Azure DevOps y desplegué servicios en Azure Container Apps. Ejecuté pruebas de carga y estrés con OWASP ZAP, manteniendo el servicio estable con 10,000 peticiones simultáneas.
Desarrollé y mantuve microservicios en Java Spring Boot desplegados en Oracle WebLogic para clientes empresariales. Escribí scripts de MongoDB que automatizaron la gestión del ciclo de vida de usuarios en pruebas y producción.
Participé en la migración de microservicios de SOAP a REST y construí modelos DTO en Spring Boot con Lombok, reduciendo código repetitivo. Gestioné código fuente con SVN en un equipo Scrum.
Education
Degrees, certifications, and relevant coursework
Corporación Universitaria Iberoamericana
Ingeniería de Software, Software Engineering
2022 - 2025
Completed a degree in Software Engineering, with professional certification from COPNIA. Worked under contract throughout the program.
Henry
Fundamentos de Ciberseguridad, Cybersecurity
2024 - 2024
Completed a course on Cybersecurity Fundamentals.
Udemy
Fundamentos de Scrum, Metodología Ágil y Gestión de Proyectos, Project Management
2022 - 2022
Completed a course on Scrum Fundamentals, Agile Methodology, and Project Management.
Universidad Francisco de Paula Santander
Ingeniería de Sistemas, Systems Engineering
2019 - 2022
Completed six semesters of Systems Engineering, with credits transferred to Software Engineering.
Tech stack
Software and tools used professionally
Availability
Location
ColombiaAuthorized to work in
Salary expectations
Social media
Job categories
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